------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008afa27c4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43526 hardirqs last enabled at (43525): [] raw_spin_rq_unlock_irq+0x14/0x24 kernel/sched/sched.h:1570 hardirqs last disabled at (43526): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43582 hardirqs last enabled at (43581): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43581): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43582): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43638 hardirqs last enabled at (43637): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43637): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43638): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43694 hardirqs last enabled at (43693): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43693): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43694): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43750 hardirqs last enabled at (43749): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43749): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43750): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000000ed0 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43806 hardirqs last enabled at (43805): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43805): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43806): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000001087 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 43896 hardirqs last enabled at (43895): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (43895): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (43896): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43480): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43480): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43457): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000001087 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 44012 hardirqs last enabled at (44011): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (44011): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (44012): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (43960): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (43960): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (43899): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ faux_driver vkms: [drm] vblank wait timed out on crtc 0 WARNING: drivers/gpu/drm/drm_vblank.c:1318 at drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318, CPU#1: kworker/1:1/26 Modules linked in: CPU: 1 UID: 0 PID: 26 Comm: kworker/1:1 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Workqueue: events drm_fb_helper_damage_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 lr : drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 sp : ffff800097de7820 x29: ffff800097de7910 x28: 0000000000001087 x27: 0000000000000000 x26: dfff800000000000 x25: 1fffe00019521c74 x24: ffff700012fbcf0c x23: ffff80008c3340a0 x22: ffff0000ca7d9000 x21: ffff80008c5c1680 x20: ffff0000ca90e000 x19: 0000000000000000 x18: 1fffe00033781890 x17: ffff80008f86e000 x16: ffff800082e5c71c x15: 0000000000000001 x14: 1fffe00033784348 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093397d48 x10: 0000000000000003 x9 : 7a4f36283c869c00 x8 : 7a4f36283c869c00 x7 : ffff80008049e510 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b5a9be0 x0 : 0000000000000001 Call trace: drm_wait_one_vblank+0x9f0/0xa50 drivers/gpu/drm/drm_vblank.c:1318 (P) drm_crtc_wait_one_vblank+0x50/0x8c drivers/gpu/drm/drm_vblank.c:1334 drm_client_modeset_wait_for_vblank+0xc8/0xf0 drivers/gpu/drm/drm_client_modeset.c:1330 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:334 [inline] drm_fb_helper_damage_work+0xb4/0x568 drivers/gpu/drm/drm_fb_helper.c:369 process_one_work+0x7c0/0x1558 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3421 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 44122 hardirqs last enabled at (44121): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1570 [inline] hardirqs last enabled at (44121): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:4995 hardirqs last disabled at (44122): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (44070): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (44070): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:650 softirqs last disabled at (44015): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]---